Drought Resistance Evaluation of Sinapis alba L.Seeds at Germination Stage under PEG Simulated Drought Stress
Four Sinapis alba L.resources were used as materials to design different concentration gradi-ents of PEG-6000 to simulate drought stress environment.The germination rate,germination potential,rela-tive vigor index,relative germination index,root length and drought resistance index of seed germination were compared under different concentrations of stress,and the drought resistance of S.alba seed germination was comprehensively evaluated.According to the results,Under the stress of 15％PEG concentration,the inde-xes of each variety(line)were the best compared with CK.Among them,the germination rate,germination potential,relative vigor index,relative germination index,root length and seed germination drought resistance index of Baijie No.1 seed were the most ideal,which were 96.65％,93.42％,106.06％,82.25％and 1.15,respectively.the variation trend of each index was more obvious than that under 15％PEG concentra-tion stress.The lowest root length inhibition rate of SA-3 strain was 79.61％at a PEG concentration of 20％,and comprehensive evaluation showed that its drought resistance ranked first,followed by Baijie 1.Therefore,a PEG concentration of 15％to 20％was the appropriate concentration for drought stress in white mustard.
Sinapis alba L.Seed germinationPEG drought stressDrought resistance
万方数据
维普
